Lug nut



FIG. 1 is a front elevated view of a lug nut showing my new design;

FIG. 2 is a side elevated view of the lug nut;

FIG. 3 is a top plan view of the lug nut;

FIG. 4 is a bottom plan view of the lug nut; and,

FIG. 5 is a top perspective view of the lug nut.

The broken lines in the drawing represent unclaimed portions of the design. 

The ornamental design for the lug nut, as shown and described. 